Is your 2009 Buick Enclave, GMC Acadia, or Chevrolet Traverse running rough, stalling, or refusing to start? Are you battling a persistent Check Engine Light that points to an internal computer failure? The Engine Control Module (ECM), the brain of your vehicle’s engine, is a common point of failure. When it malfunctions, it can cause a cascade of frustrating and seemingly unrelated issues. This replacement Engine Control Module, part number 19300016, is the definitive solution to restore your vehicle’s performance, reliability, and efficiency.
This isn’t just a part in a box. We provide a crucial service that makes this a true plug-and-play solution. Before we ship the module, our technicians will program it specifically for your vehicle using the VIN you provide. This process loads the latest, most stable software updates directly from GM, ensuring optimal communication with all other vehicle systems and correcting many factory-known issues. This eliminates the need for an expensive trip to the dealership for programming, saving you both time and money.
From the Diagnostic Bay
We had a 2009 Acadia come into the shop with a random misfire on cylinder 3 that just wouldn’t go away. The owner had already replaced the spark plug, ignition coil, and even the fuel injector, but the P0303 code kept coming back. After hours of checking wiring and compression, we hooked up our scope to the injector driver circuit on the ECM. Sure enough, the signal was weak and erratic. The internal driver inside the original ECM was failing under load. We installed one of our pre-programmed modules, performed the security relearn, and the misfire was gone for good. It’s a classic case where the problem isn’t the component being controlled, but the controller itself.
Symptoms of a Failing 2009 Enclave Engine Module
A faulty ECM can manifest in many ways, often mimicking other component failures. If you’re experiencing any of the following, your engine computer may be the culprit:
- ✔ Persistent Check Engine Light (CEL) with codes for internal processor failure, sensor circuits, or communication errors.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Rough or erratic idling.
- ✔ A complete no-start condition where the engine cranks but won’t fire up.
- ✔ Noticeable decrease in fuel economy.
- ✔ Transmission shifting problems or harsh engagement.
- ✔ Intermittent issues that seem to have no logical cause.
- ✔ Failure to communicate with a diagnostic scan tool.
The Importance of VIN Programming
The 3.6L V6 engine used in the Enclave, Acadia, Traverse, Outlook, CTS, and STS is a sophisticated powerplant. The ECM controls everything from fuel injection timing and spark advance to variable valve timing and transmission shift points. A generic, non-programmed module simply will not work. It must be precisely matched to your vehicle’s specific options, emissions calibration, and anti-theft system. By providing your VIN, you guarantee that the 2009 Enclave Engine Module you receive is a perfect electronic match, ready for installation and a quick security relearn procedure.
This module is a direct replacement for several original equipment part numbers, including: 12623325, 12628387, 12605672, 12630594, and 19300016. Please verify your part number or contact us with your VIN to confirm compatibility.
Installation Process
On these GM Lambda platform vehicles (Enclave, Acadia, Traverse, Outlook), the ECM is typically located behind the fan shroud in the engine bay, making it relatively accessible. While the physical swap is straightforward for a competent DIYer or any professional technician, a final security relearn procedure is often required to sync the new module with your vehicle’s anti-theft system. This procedure can usually be done without special tools and involves a series of key cycles. Instructions are widely available online or in service manuals.
Frequently Asked Questions
Do I need to do anything after I buy this ECM?
Yes. After you complete your purchase, you MUST send us your vehicle’s 17-digit VIN. We cannot ship the module until we have programmed it with your specific vehicle information.
Is this part difficult to install?
The physical installation is generally straightforward. However, you will likely need to perform a security relearn procedure to sync the new ECM with your vehicle’s keys and anti-theft system. This typically takes about 30 minutes and involves a sequence of key turns.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of your old ECM, then yes, this part will resolve the issue. It’s crucial to have a proper diagnosis to confirm the ECM is the root cause before ordering.
What if I have a different part number?
This module is a direct replacement for part numbers 12623325, 12628387, 12605672, 12630594, and 19300016. If your number is not on this list, please contact us with your VIN to verify compatibility.
What information is programmed into the module?
We use your VIN to load the correct GM-certified software for your engine, transmission, and all factory-installed options. This ensures seamless integration and performance, just like the original.